Editorial & Research Policy
Last updated: 2026-10
Scope and responsibility
This site is an industrial valve reference and quotation portal covering valve families for isolation, regulation and check service. Editorial responsibility for the published content rests with the site operator; requests and questions reach us through the contact page .
Where our technical content comes from
Specification values, material options, standards references and selection guidance on this site are built from collected public documentation of the relevant industry. Every collected source is classified into one of the categories below, and the collected evidence (source URL, an excerpt of the supporting text, and the collection date) is retained internally for every published specification field. The full collected-source index is published at /research/.
| Source class | What it is | How we use it |
|---|---|---|
| Manufacturer documentation | Technical documentation and catalogs published by valve manufacturers | Product specification fields (sizes, pressure classes, materials, end connections, operation) |
| Industry / professional reference | Professional associations, industry publications and reference portals | Selection guidance, application context and cross-checking of manufacturer values |
| Engineering reference | Engineering handbooks and technical references | General engineering context (flanges, dimensions, materials behaviour) |
| Application note | Documentation of specific applications and installations | Use-case descriptions where the application is documented by the source |
Where a specification value comes from a peer supplier's published material rather than a governing standard, it is treated as supplier-reported: useful for that named product, not as an industry rule. Values that conflict between sources keep both statements with their applicable conditions rather than being silently averaged.
Evidence requirements
- Every published specification field carries an internal evidence record: source URL, exact excerpt and collection date.
- A field without a collected evidence record is not published as a confirmed value β it stays absent, and the page says so rather than filling the gap with a guess.
- Numbers carry their units and service conditions where the source states them.
- Facts from collected sources are kept separate from our interpretation; selection notes on this site are labelled as guidance.
- Specification values defer to the governing standard edition β where a standard applies, confirm the current edition at quotation.
Standards and certification claims
Standards are cited by their published designation and scope. A standard being referenced on a product page means the collected documentation associates that product with it β it is not, by itself, a certification claim. Certificates, inventory, pricing and delivery terms are confirmed per quotation, not asserted from collected third-party pages.
Corrections
If a statement on this site is wrong or outdated, send us: (1) the page URL, (2) the exact statement you dispute, and (3) a supporting document or authoritative source. Use the contact page. Verified corrections are applied to the page content, and the page's "last updated" date changes only when the evidence, scope or wording of the page changes β a technical rebuild alone does not refresh it.
No endorsement
Sources listed in the research index and cited in our content are collected references. Citation does not imply endorsement, partnership, or that the cited publisher approves of this site. Likewise, peer manufacturer material used to document a product specification does not transfer that manufacturer's certification, warranty or performance commitments to us β see the privacy notice for what data this site itself collects.